P08B3Neutral Position Sensor B Not Learned
- Generic OBD-II code · Powertrain
- How the car detects it
- Analog neutral sensors report a position value, and the control module must learn which value means neutral to cover part and fitting tolerances. P08B3 says no valid learned value exists for sensor B, typically after replacing the sensor, gearbox or module, after a software update, or after an aborted learn. No manufacturer documents P08B3 publicly; the A counterpart P086F is used by GM on the LT5 Corvette. A Schaeffler patent describes the learn: the driver engages neutral and the gears, and a run is rejected if the reading wanders too much in its roughly one-second window. FCA notes a neutral sensor learn procedure after service that restores cruise control. CARB 1968.2 (e)(15) applies. Fix is usually a relearn by scan tool.
- What you may notice
- Start-stop unavailable
- Cruise control may be inoperative
- Appears right after a repair or software update
- Likely causes
- LikelyLearn procedure not done after sensor, gearbox or module replacement
- PossibleLearn run aborted, lever unsteady or linkage misadjusted
- PossibleLearned values erased by software update or module reset
- RareSensor mounted outside the learnable range or faulty
- Repair
- Easy · Usually a job for a workshop.Typical cost: €30 – €150
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.